In-plane ferromagnetism-driven topological nodal-point superconductivity with tilted Weyl cones

Maciej Bazarnik; Levente Rózsa; Ioannis Ioannidis; Eric Mascot; Philip Beck; Krisztián Palotás; András Deák; László Szunyogh; Stephan Rachel; Thore Posske; Roland Wiesendanger; Jens Wiebe; Kirsten von Bergmann; Roberto Lo Conte

arXiv · 2601.03929

In-plane ferromagnetism-driven topological nodal-point superconductivity with tilted Weyl cones

Maciej Bazarnik·Levente Rózsa·Ioannis Ioannidis·Eric Mascot·Philip Beck·Krisztián Palotás·András Deák·László Szunyogh·Stephan Rachel·Thore Posske·Roland Wiesendanger·Jens Wiebe·Kirsten von Bergmann·Roberto Lo Conte

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Abstract

The potential application of topological superconductivity in quantum transport and quantum information has fueled an intense investigation of hybrid materials with emergent electronic properties, including magnet-superconductor heterostructures. Here, we report evidence of a topological nodal-point superconducting phase in a one-atom-thick in-plane ferromagnet in direct proximity to a conventional $s$-wave superconductor. Low-temperature scanning tunneling spectroscopy data reveal the presence of a double-peak low-energy feature in the local density of states of the hybrid system, which is rationalized via model calculations to be an emergent topological nodal-point superconducting phase with tilted Weyl cones. Our results further establish the combination of in-plane ferromagnetism and conventional superconductivity as a route to design two-dimensional topological quantum phases.

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Maciej Bazarnik, Levente Rózsa, Ioannis Ioannidis, Eric Mascot, Philip Beck, Krisztián Palotás, András Deák, László Szunyogh, Stephan Rachel, Thore Posske, Roland Wiesendanger, Jens Wiebe, Kirsten von Bergmann, Roberto Lo Conte. 2026-01-07. In-plane ferromagnetism-driven topological nodal-point superconductivity with tilted Weyl cones. https://arxiv.org/abs/2601.03929

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